<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>引入方式2</title>
    <!--内部样式-->
    <style>
        div{
            color: red;
            font-size: 20px;
        }
    </style>
</head>
<body>
    <div>div1</div>
    <div>div2</div>
</body>
</html>